@charset "utf-8";
$width:90%;
body{
    display: flex;
    justify-content: center;
}
#app{
    text-align: center;
    background:url("背景.jpg");
    width:$width;
    height: $width;
    display: flex;
    flex-direction: column;
    align-items: center;
    // align-content: center;
}
.input{
    display: flex;
    // justify-content: center;
}
.list{
    height: $width/2;
    ul{
        li{
            list-style: none;
        }
    }
}